Automatic stop-governor.



J. BRESLOVB,

AUTOMATIC STOP GOVERNOR.

APPLIUATION FILED JAN.13, 1906. RENEWED SEPT. 16, 1907.

Patente 1%1229, 1910.

3 SHEETS-SHEET 1.

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7 m I 7 g 45 INVENTOR ATTORNEY J. BRBSLOVE.

AUTOMATIC STOP GOVERNOR.

APPLIOATION FILED JAN.13,1906. RENEWED s31":: 16, 1907.

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WITNESSES: INVENTQR Ammawn GHAHAM co PHOTO-LITHOGRAFHERQ WASHINGTON u c1 ma ve 7N itill i a JOSEPH BRESLOVE, OF PITTSB UEG,

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'zihl'iif it, ASSIGNOR TG TEE W'ESTZNGHGUSE LIQN GE PAIJITSYLVANIA.

AUEGMATIC STQP-GG'i ER-NGR.

Application filed January 13, 1306. Serial No.

To all whom it may concern:

Be it known that I, JosicrI-I Brinsnovn, a citizen ot the United States.and a residentot Pittsburg, .in the county of Allegheny and State ofPennsylmnia, have invented a new and useful Improvement in Auto maticSt'O] )GOVl?l101'S, of which the tollowing is 2 specification.

This invention relates to governors and more particularly to automaticstop governors.

An object of this invention is the production of comparatively simpleand etlicient means for automatically cutting oil the supply of motivetluid to an engine when the engine exceeds a predetermined speed.

It further object is the production oi an automatic stop governor inwhich means are utilized such that the tluid supply,v atter beingautomatically cutotl', will remain so until the goveri'ior and governormechanisms are readjusted.

Elastic fluid turbines and all other types of engines are ordinarilyprovided with speed governors, the functions ot which are toautomatically proportion the steam supply to the engine in ac'ordancewith the load demand. It is also customary to provide auxiliary orautomatic stop governors which are effective in shutting oitt the supplyct motive l'luid to the engine or turbine when the engine. cue to someextraordinary circumstances, exceeds a speed beyond which its operationwould prove dangerous. In turbine practice it is necessary. because ofthe excessive speeds encountered. to provide adequate and effectivemeans for lubricating all the running parts, and it has been an objectof my invention to provide an automatic stop governor adapted to run inoil. and one in which. the friction between the moving parts is as taras possible eliminated.

These and other objects I attain in a gov ernor embodying the teaturesdescribed in the specification and illustrated in the accompanyingdrawings. throughout the several views of which similar elements aredenoted by like characters.

In the drawings Figure 1 is a sectional elevation of a fluid actuatedcut-oil valve utilized with this invention. Fig. 2 is a sectionalelevation of a governing device controlling the operation of the eutoffvalve. Fig. is a section along the line A A of 2. is a section along theline ll of i 2. 5 is an elevation of a detail of this invention. Fig. 6is a section along the line D l) of Fig. .1.

t fhrougho-ut the further des ription of this invention it will hedescribed in connection with an elastic fluid turbine without any ideaoilimiting its application to such engines.

Located conveniently in the motive fluid supply line of a turbine is avalve casing T. which is provided with a tluid inlet port 8 and anoutlet port 9, and within which a piston valve 10,. adapted to controlthe tlow ot motive Fluid through the valve casing, operates. i valvestem 11. is connected to the. piston v: lve l0 and projects through anend all 12 ot the casing 7 into a valve motor cylinder 13, the casinglet ot' which is secured to the casing T. The valve motor cylinder 13 isbored to two diameters and the valve stem 11 carries two pistons, 15 and16. which are located. in the diit'erent size bores. Each pistonpreferably water grooved to preserve a fluid tight iit within thecylinders and a chamber 17 is located above the piston 15. A bvpass 18leading from the end wall 12 of the valve casing 7 through. the casing ll; coin'iects the chamber 17 with the interior of the valve casing 7 andis provided with a hollow plug 19. adapted to insure the port 18registering with the port below it when the parts are assembled. Abushing 21 surrounding the stem 11 and located in the end wall 12 oi.the valve casing T so arranged that motive liuid from the interior ofthe valve casing is allowed to leak through the bushing into thecylindmr 1 3 and below the piston it pipe 22 entering the c vlindcr 13at a point below the piston 17 connects the cylinder with the atmosphereand is provided with an automatically actuated valve 23, the operationof which. will hereinafter be descriliied. A rod 24. mounted on thepiston 16 extends through an opening in the casing let forming a visibleindicator ot' the position of the valve 10.

Assuming that the pipe -2 is closed to the. atmosphere and that theinterior 01 the valve casing '7 is subject to fluid pressure; it isapparent that the pressure below the piston 15, due to the leakage offluid through the bushing 21 will hold the valve open against the fluidpressure in the chamber 17, because of the difference of effective areason the opposite sides of the piston 15. It will be seen, however, thatwhen the pipe 22 is open to the atmosphere and the motive fluid in thecylinder 13, below the piston 15, is exhausted, the piston 15 will beforced down by the fluid pressure in the chamber 17 and the valve 10will be closed.

The controlling device for operating the valve 10 comprises an inertiaweight 25 pivotally mounted on a bolt 26, carried by a rotatable housing27, which is mounted on a shaft 28 and is driven through a flexiblecoupling 29 by the turbine shaft 31. The shaft 28 is journaled in abearing 32, which is formed integrally with the bearing housing 33 ofthe turbine shaft. The weight 25 is normally held by a helical spring 34against a stop lug 35, formed integrally with the housing 27. One end ofthe spring 3 1 is mounted on a spring block 36, which is provided with amounting and adjustable bolt 37, adapted to be secured to the housing27. The other end of the spring is mounted on a support 38 with whichthe weight 25 is provided, and the arrangement is such that the pull ofthe spring is transmitted to the weight through a knife-edge 39 withwhich the mounting portion is provided. The

weight is so located that its center of gravity is slightly eccentric tothe axis of rotation of the housing and the arrangement is such that thecentrifugal force occasioned by the rotation of the housing causes theweight to swing about a. knife-edge ll with which the bolt 26 isprovided. The weight is provided with an outwardly extending trippinglug 42, the axis of which, for the normal position of the weight,coincides with the axis of ro tation of the housing, but as the weightmoves outward, due to the increasing centrifugal force, the lug willrevolve about the axis of rotation in circles, which increase indiameter as the speed of the turbine in creases, until at some excessivespeed it con tacts with a stop lug 43 with which the weight housing isprovided.

A casing 4.1 mounted on the bearing housing 33 of the turbine shaftincloses the weight housing 2'7 and is adapted to be filled with oil orother lubricant, which may be conducted from the bearing housing orthrough suitable conduits leading from the turbine lubricating system. Avalve 23 is mounted on the casing 11 and is provided with a port 45which communicates with the pipe 22, and an exhaust port 46 whichcommunicates with the atmosphere through a pipe L7. A valve-disk a8 islocated within accumulated Z the valve casing and is adapted to closethe port 15 to the atmosphere. The valve-disk a8 is provided with avalve stem 49, on which a disk 50 is mounted, which operates in acylinder 51. A helical spring 52 mounted on the disk 50 is locatedwithin the cylinder 51. and is connected to a spring block 53, which isprovided with a bolt 5% extending out of the cylinder through a suitableopening.

A lever fulcrumed on a pin 56, which is suitably mounted on a lug 57, isprovided with contact arms 58 and 59, and an outwardly extending arm 61.The arm 58 contacts with the bolt 5% and through the spring :32 controlsthe operation of the valve 23. The arm 59 contacts with, and is held inan operating position by, a finger 62 of an adjusting or locking device63, which extends through the casing 44 and is suitably journaled on thelug 57.

A releasing pin 6t of the adjusting device 63 is located within thecasing H and is arranged to contact with the lug 42 of the weight 25 forcertain positions of the weight, and finally, for some predetermined andexcessive speed of the turbine, the lug 42 is moved to such a positionthat it contacts with the releasing pin 6% and the finger 62 willrelease the lever lVhen the arm 59 of the lever is in op eratingposition, in contact with the finger (52, the arm 58 will contact withthe bolt 54; and hold the valve closed against the pressure of theconfined fluid in the cylinder 13 and thereby hold the valve 10 open.hen the lever is released through the agency of the lug 42 and theadjusting device, the accumulated pressure of the cylinder 13 moves thevalve disk 48 to such a position that the pipe 22 is thrown intocommunication with the exhaust port t6, the valve 10 is then closed bythe unbalanced fluid pressure in the chamber 17, and the motive fluidsupply to the turbine is cut off.

The pipe and the exhaust port a6 are relatively large in comparison withthe leakage opening through the bushing 21, and therefore the flow ofmotive fluid through the chamber 13 will be unrestricted and the valve10 will remain closed until the lever and the tripping device 63 arereadjusted.

A contact pin (55 is so located on the lug 57 that a delicate adjustmentof the tripping and adjusting device is insured and the tension of thespring may be adjusted by the bolt 54 to accord with the pressure in thecylinder 13.

The operation of the weight 25 may be controlled by adjusting thetension of the spring 3% through the bolt 37, and since all the movingparts operate on knife-edge connections variations of the temperature orof the conditions of the lubrication will not esaeeo materially affectthe operation. of the weight and coi'isequently the ultimate speed ofthe turbine may be gag-ed with close precision. The housing 27 is solocated and arranged that it will not excessively agitate the oil orother lubricant contained in the casing 1T, even while running at a highrate of speed. This characteristic is quite essential as undue heatingof the lubricant proves very objectionable. The housing 2'? is soarranged that, with the exception oi the mounting bolts, no extendingand retarding surfaces are presented to the oil in the easing a l andthe tripping lug e operates so near the axis of revolution that it doesnot add. appreciable resistance to the rotation of the housing oragitate and heat up the lubricant an objectionable amount. The spring 34is z ranged to hold the weight normally against the lug 35 and theknifeedge 41 and under such conditions the triotion of rest will not beappreciably greater than the friction of motion.

It is obvious that many variations and changes in detail andconstruction of the device would readily suggest themselves to a personskilled in the art and still fall within the limits and scope of thisinvention.

The invention is not limited therefore to the exact details ofconstruction and arrai'igement above set forth.

hat I claim a new and useful and desire to secure by Letters Patent is:

1. In combination with a cut-off valve, a speed-responsive device,adapted to close said cut-oh valve, comprising a. rotatable casing, aninertia weight mounted in said casing, a spring resisting the action ofsaid weight and knife-edge connection between said weight and saidcasing, and said weight and said spring.

2. In combination with a cut-oil valve. aspeedi'esponsive device adaptedto close said valve, comprising a rotatable casing, an inertia weightmounted in saic casing, a spring resisting the operation of said weightand a stationary casing inclosing said speed responsive device.

3. In combination with a. cut-oil valve, a speed-responsive deviceadapted to close said valve, comprising a rotatable casing, an inertiaweight mounted in said casing, a spring resisting the action of saidweight and means for immersing said speed-responsive device in alubricantbath.

4:- In combination with a cut-oil valve, a rotatable casing, aspeed-responsive device contained within said casing, means dependent onsaid speed-responsive device for closing said cut-off valve and meansfor immersing said casing and said speed-responsive device within alubricant bath.

5. In combination with a cut-oil valve, an auxiliary valve adapted tocontrol the I i l l l l l I l i operation of said. cutoff valve, aspeed-re sponsive device adapted to control said auxiliary valve,comprising a rotatable casing, an inertia weight mounted on a knife-edgeprovided in said casing, a spring resisting the operation of said weightmounted between said casing and a ln'iit'e-edge on said weight.

6. In combination with a cut-off valve, an auxiliary valve adapted tocontrol the operation ot sait cut-off valve, a locking device for saidauxiliary valve, comprising a lever adapted to close said valve, alinger adapted to hold said lever in the closing position, a trippingdevice incloscd within a casing on which said auxiliary valve and saidlocking device are mountecha releasing pin within. said casing connectedwith said finger and adapted to be moved by said tripping device tothereby release said lever, open said auxiliary valve and close saidcutoff valve.

7. In combination with a cut-oil valve, an auxiliary valve adapted tocontrol the operation of said cut-oil valve, a locking device for saidauxiliary valve, comprising a lever adapted to close said valve, afinger adapted to hold said valve in the closing position, a trippingdevice comprising aspeed-respon sive agent incloscd within a casing uponwhich said auxiliary valve and said locking device are mounted, areleasing pin within said casing and connected with said linger adaptedto contact with said tripping device and release said lever, opensaidvalve and thereby close said cut-oil valve.

8. In combination with a cut-off valve, an automatically actuatedcontrolling valve communicating with said cut-otl valve, a le vercontrolling the operation of said con trolling valve, a fingercontacting with said lever, a tripping device mounted within a rotatablecasing comprising a pivotally mounted inertia weight provided with anextending lug adapted to contact with a pin connected with said fingerand means for immersing said tripping device in a lubricant bath.

9. In combination with a fluid-actuated cut-oil valve, anautomatically-actuated con trolling valve communicating with said cutofivalve, a lever adapted to close said controlling valve, a lingercontacting with and adapted to hold said lever in the closing position,a tripping device, comprising an inertia weight mounted in a rotatablecasing and provided with an axially extending contact lug incloscdwithin a stationary casing exterior to which and on which saidcontrolling valve, said lever and said finger are mounted, a. releasingpin within said casing and connected with said finger adapted to bemoved by said contact lug and thereby release said lever, open saidauxiliary valve and close said cut-off valve and means for immersingsaid tripping device in a lubricant bath. 7

10. In combination with a cut-cit valve, a speed responsive deviceadapted to control the operation of said valve, said speed responsivedevice comprising a rotatable memher and an inertia weight mountedeccentrically on said member and adapted to move across said memberunder the intluence of centrifugal force.

11. In combination with a cut-off valve having an open position and aclosed position but no intermediate position, a speed responsive deviceadapted to control the opera tion of said valve, comprising a rotatablecasin an inertia weight mounted within said casing and a springresisting the eccentric motion of said weight, incident to thecentrifugal force developed by the rotation of said casing.

12. in combination with a cut-off valve, a speed responsive deviceadapted to control the operation of said valve, comprising a rotatablecasing, an inertia weight mounted within said casing, a spring resistingthe action of said weight and means for introducing lubricant into saidcasing.

13. In combination with a cut-off valve, a rotatable casing, a speedresponsive device contained within said casing, means dependent on saiddevice for closing said cut-01f valve and means for introducinglubricant into said rotatable casing.

1a. In combination with a cut-oil valve, an auxiliary valve adapted tocontrol the operation of said cut-oft valve, a speed responsive deviceadapted ,to control said auxiliary valve, comprising a rotatable casing,an inertia weight mounted within said casing, a lug carried by saidweight and adapted to move eccentrically of the axis of rotation of saidweight to operate said auxiliary valve.

15. In combination with a cut-ott valve, a speed responsive deviceadapted to control said valve, comprising a rotatable casing, an inertiaweight within said casing, a lug carried by said weight and adapted tomove eccentrically of the axis of rotation of said weight to close saidvalve.

16. In combination with a cut-oil valve, a controlling valvecommunicating therewith, a lever controlling the operation of said controlling valve, a finger contacting with said lever, and a trippingdevice mounted within a rotatable casing and comprising a pivotallymounted inertia weight provided with an extending lug adapted to contactwith a pin connected with said finger to open said controlling valve.

1'7. In combination with a cut-ofi valve, a controlling valve operatingin conjunction therewith, a lever controlling the operation of saidcontroller valve, a finger contacting with said lever, and a trippingdevice mounted in a rotatable casing and comprising a pivotally mountedinertia weight provided with an extending lug which moves eccentricallyof the axis of rotation of said casing to contact with said finger andoperate said controlling valve.

18. In combination with a cut-oil valve, a speed-responsive device,adapted to close said cut-off valve, comprising a rotatable casing, aninertia weight mounted in said casing and a spring resisting the actionof said weight and knife-edge connection between said weight and saidcasing.

19. In combination with a cut-oif valve having an open position and aclosed position but no intermediate position, a speed responsive deviceadapted to control the operation of said valve comprising a rotatablemember, a weight pivotally mounted on said member and adapted to moveacross said member under the influence of centrifugal force and a springbetween said member and said weight adapted to resist the motion of saidweight.

20. In combination with a cut-0E valve, an auxiliary valve adapted tocontrol the operation of the cut-off valve, a speed responsive deviceadapted to control said auxiliary valve, comprising a rotatable memberand an inertia weight mounted on said member, a lug carried by saidweight and adapted to move eccentrically of the axis of rotation ofsaid. weight to operate said auxiliary valve.

21. In combination with a cut-01f valve, a speed responsive deviceadapted to control said valve comprising a rotatable member, an inertiaweight mounted on said member and provided with a lug adapted to moveeccentrically of the axis of rotation of said member to close saidvalve.

In testimony whereof, I have hereunto subscribed my name this 11th dayof January, 1906.

JOS. BRESLOVE. lVitnesses CHARLES W. MOGHEE, JNo. S. GREEN.

